Wrench.



MnRL H.v HARTMAN, .or strinse', 'WEST VIRGINIA.

` WRENCH.

Specification of Letters Patent.

patented oet. 1,1907.

ippseaiensiea sp'l 1,1901'. serial 1re. seared- To all whomtt .mayconcern:

Be it known that I,

MRL H. HARTMAN, a citizen oi' the United States, residing at Elkins, inthe county 0i Randolph and St at e4 of certain new and usefulImprovements in Wrenches, of

whichthe following is a speciiication, reference being had therein tothe 'accompanying drawing;

andcomparatively inexpensive Construction and' which My inventionrelates to Wrenches o thattype in which the movable jaw may*` be quicklyadjusted. l

' T-he object of theinvention is to 'provide a device ofthis characterwhich will be of simple, strong,v durable;-

' may. be quickly and easily' adjusted.

Further objects'and advantages oi the invention", asA well as thestructural features by means of which these objects are attained, .willybe made elear by anexamination of the following speciicatin, takenjinconnection with the accompanying drawings, in which,

.Figure `1 is a side elevation of my improved monkey wrench; Fig. 2 isanedge view of the same; Fig.V 3 is a' longitudinal section through the,wrench, showing in full lines its movable yjaw'inv its locked positionand in .dotted lines said jaw in its released position; Fig. 4'lis anelevation of the Vinner edge oi themovable jaw; Figs'.

7 is aview similar to Fig.'6, but'showing the position oi the parts whenthe movable jaw of' the vwrenchis released or unlocked.

Referringvto the drawings by numeral 1 denotes the shank or bodyp'ortionof the wrench, the upper part oi I stem or shank 5 provided with aflat,rinner tace to slid' 4'which is rectangular in cross section andhas upon it` the stationary' jaw 2 oi the wrench. The coacting movablejaw 3 is adapted to slide longitudinally on the rectangular portion ofthe shank 1 adapted to' have a slight swinging movement thereon;

'rise ewinging 'Y opening 4 in the jaw- 3 through which the shankl pro-40v movement is permitted vby Haring the jects and slides.

Depending from the bottom of the jaw 3 is an integral ably .engagethe-tlat inner tace 6 oi the shank 1. The

shank 5 is formed initsinner face with a longitudinally extending groove7 and witha series oftransversely extending ratchet teeth 8. The latterlare adapted to beengaged, by one or more ratchet lteeth 9 formed uponthe flat inner ace' Got the shank Thevlower end ofthe shank 1 is reducedand of substantially semicircularshape in cross section, as shown at l()in Fig. 6, and beneath said portionlO is a.later' 4allyoffsetcylindrical portion 10'. adapted to serve as a bearing for the handle ashereinafter explained.; and

the extreme lower end of said shank is ormed witha reduced threadedportion 11'.

' The shank is similar in shape to that oithe portion West Virginia,have invented formed and is also `l() of the shank sothat` the lowerends of both ofthe i.

vshanks may be telescoped by a handle 12 formed with acylindricalfborel3.f i The diameter of the upper portionoi the bore13,"as 60 shown itx-Figi 6, is equal -to the combined thickness oi thelower ends' of the shanks land 5," so thatsaid heure 'wiube heidinreemeetwith eeeh ethereed with improvements v in monkeyl the ratchetteeth 8, 9', in engagement and the movable jaw will be thus locked uponthe 'shankofrthe station- 65 "I ary jaw.. The lower portion'o'f the bore1 3 'is reduced to receive the cylindrical'bearing portion 10i.' of thei shankl and to thereby give the handle a rm bearing so that it cannottilt laterally or transversely.

To enable ,the ratchet'teeth 8 on the s liank o the 70 movable jaw to bedisengaged from the teeth 9 onthe I shank 1, a cavity or recess 14 isformed in oneside of the-bore 13, so thatwhen the handle is turned uponthe shanks to its position shown in Fig.v 7,.the lower;r .end-'o.theshank 5 will swing outwardly into said 7 5 14, thereby 'disengagingthe Iratchet teeth so as to ,enable the jaw 3 to be moved'longitudinallyon the shank `1 The shank'5 is moved-outwardly by a'leafspring .15,7

lwhichl has one of its ends secured at 1d in'the' lower portion of theshank 1 and its other end projecting into 80 the longitudinal groove 7in the shank 5. A'stationary collar or-sleeve 17 is'prov'ided upon .the

shanks 1 and 5 'between'theupper end oT the handle* and a shoulder 18formed by reducing the` lowerl end of the shank 1. This collar l17 titsthe reduced rec tangular portion oi' said shank and its openingf, 19

I through which both of theshanks project is of suicient width to allowfor the swinging movement oi the shank 5. The sleeve1-7 and handle 12are retained upon the' shanks by a nut 20 engagedwitll the threaded end'90 of the shank l, as clearly shown in Figi.- 3. In order` to readilyindicate thetwo positions to which the handle must be turned tolock andreleasethe movable jaw 3, l preferably forni o n the stationary sleeve17 marl or scores 21, 22, and upon the handle' 12, an arrow or 95 Iscore 23 which is moved intol alinement with'lthe q points 21-, 22..The' construction, operation and advantages oi" the invention will bereadily understood upon-reference to -the drawings. lt will'be seen thatwhen the mov- 100 ablejaw 3 is locked the arrow- 23 alines with thepoint 22 and the shanks l and 5 are'held in contact with each `otherowingl to their engagement with the walls oi the opening or -bore 13inthe handle 12. When the shanks are in this position. the ratchet teeth 8and 9 meshA 105 with each other and effectifely hold the jaw 3 against Ylongitudinal movement. When it is desi-red to release` the jaw 3 so thatit may be'adiusted longitudinally on 4the shank l, the handle 12 isgiven quarter turn and its'arrow 23 causedto aline with the point 21.This positiono the parts is indicated in dotted lines inFig. I

3 and in'full lines in 7. Whexi, the handle 12 is' may ',be quicklyadjusted longitudinally to fit a nut,

bolt or the like of any siz'e inserted between it and its enactingstationary jaw 2.

It Will be observed that the device isof simple, strong and durableconstruction so that it Amay be manufactured at a eolnparat-ively smallcostl and its parts' will not readily become disarranged or broken. IHaving thus described lmy invent-ion'wh'at I claim as new-and desiretosecure by Letters Patent of the .United -Sltatessqi A wrenchcomprising a stationary Jaw having a shank fformedat one endl with acylindricalhearingr portion and at points intermediate its ends with astop shoulder and a `stationary pawl, a movable jwlhaving a shank andraloop lto surround the shank of thestationary jaw, one 'wall oi said loopbeing inclinedwtopermit thexshank of the movable jaw to rock upon theshank of the stationary one `said shank ofpthe movable jaw beingprovided with a longitudnal'series of ratchet teeth to engngesaidstationary pawl and witlra longitudinali;Y extending' groove, a leafspring. carried by the shank of the' stationary jaw and adapted to entersaid groove, a stationary collar surround` lng the Shanks of both jawsand engaged with the shoulY der upon the shank of the stationary one,said collar being adapted to guide the shank of the movable jaw ln itssliding and rocking; movement, a handle to telescope and rotate uponboth of said Shanks and formed with a bore hating an enlarged upperportion and a reduced lower por tion'to engage said cylindrical 'bearingon the shank o1' the stationary jaw, the enlarged upper portion of thebore of the handle being formed with a cavity or reeess to receive theshank of the movable jaw, and means upon the shank oi the stationary jawfor retaining said collar and handle upon said shanks, substantially asdescribed.

In testimony whereof I hereunto afllx my signature ln presence of twowitnesses.

, MERL H. HARTMAN. Witnesses l LESLIE IlAnoING, ,l2-H. Moons.

